/**
 * Copyright 2000 self.com.au
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License. (http://www.apache.org/licenses/LICENSE-2.0)
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed 
 * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for 
 * the specific language governing permissions and limitations under the License.
 *
 * <dhamma-message src="Atisha (11th century Tibetan Buddhist master)">
 * 	The greatest achievement is selflessness. The greatest worth is self-mastery.
 * 	The greatest quality is seeking to serve others. The greatest precept is continual awareness.
 * 	The greatest medicine is the emptiness of everything. The greatest action is not conforming with the worlds ways.
 * 	The greatest magic is transmuting the passions. The greatest generosity is non-attachment.
 * 	The greatest goodness is a peaceful mind. The greatest patience is humility.
 * 	The greatest effort is not concerned with results. The greatest meditation is a mind that lets go.
 * 	The greatest wisdom is seeing through appearances. 
 * </dhamma-message>
 *
 * @author Ashin Wimalajeewa
 */
package self.amigo.tool;

import java.awt.event.ActionEvent;
import java.util.List;

import javax.swing.AbstractAction;
import javax.swing.JMenu;
import javax.swing.JMenuItem;

import self.amigo.editor.cmd.SelectionForwardBackPositioning;
import self.gee.editor.ICommand;
import self.gee.editor.IDiagramEditor;

public class ForwardBackManager {
  private IDiagramEditor          editor;
  
  private JMenuItem               viewToFrontItem;
  private JMenuItem               viewToMoveForwardItem;
  private JMenuItem               viewToBackItem;
  private JMenuItem               viewToMoveBackwardItem;
  
  private List                    currentSelections;
  
  public ForwardBackManager( IDiagramEditor ed, List selections ) {
    editor = ed;
    currentSelections = selections;
  } 
  
  public void resetMenus( int count ) {
    boolean enable = count > 0;
    viewToBackItem.setEnabled( enable );
    viewToMoveBackwardItem.setEnabled( enable );
    viewToFrontItem.setEnabled( enable );
    viewToMoveForwardItem.setEnabled( enable );
  }
  
  public void installMenus( JMenu viewItem ) {
    viewToFrontItem = viewItem.add( new AbstractAction( "To Front" ) {
    	
    	/**
    	 * If the internal state of this class ever changes in such a way that it can't be defaulted,
    	 * then the {@link #serialVersionUID} should be incremented to ensure serialized instances cleanly fail.  
    	 */
    	private static final long serialVersionUID = 1;
    	
          public void actionPerformed( ActionEvent e ) {
            ICommand cmd =  new SelectionForwardBackPositioning( editor, 
                currentSelections, SelectionForwardBackPositioning.TO_FRONT );
            editor.executeCommand( ICommand.ET_EXECUTE, cmd );
          }
        }
      );
      
    viewToMoveForwardItem = viewItem.add( new AbstractAction( "Move Forward" ) {
    	
    	/**
    	 * If the internal state of this class ever changes in such a way that it can't be defaulted,
    	 * then the {@link #serialVersionUID} should be incremented to ensure serialized instances cleanly fail.  
    	 */
    	private static final long serialVersionUID = 1;
    	
          public void actionPerformed( ActionEvent e ) {
            ICommand cmd =  new SelectionForwardBackPositioning( editor, 
                currentSelections, SelectionForwardBackPositioning.MOVE_FORWARD );
            editor.executeCommand( ICommand.ET_EXECUTE, cmd );
          }
        }
      );
      
    viewToBackItem = viewItem.add( new AbstractAction( "To Back" ) {
    	
    	/**
    	 * If the internal state of this class ever changes in such a way that it can't be defaulted,
    	 * then the {@link #serialVersionUID} should be incremented to ensure serialized instances cleanly fail.  
    	 */
    	private static final long serialVersionUID = 1;
    	
          public void actionPerformed( ActionEvent e ) {
            ICommand cmd =  new SelectionForwardBackPositioning( editor, 
                currentSelections, SelectionForwardBackPositioning.TO_BACK );
            editor.executeCommand( ICommand.ET_EXECUTE, cmd );
          }
        }
      );
      
    viewToMoveBackwardItem = viewItem.add( new AbstractAction( "Move Backward" ) {
    	
    	/**
    	 * If the internal state of this class ever changes in such a way that it can't be defaulted,
    	 * then the {@link #serialVersionUID} should be incremented to ensure serialized instances cleanly fail.  
    	 */
    	private static final long serialVersionUID = 1;
    	
          public void actionPerformed( ActionEvent e ) {
            ICommand cmd =  new SelectionForwardBackPositioning( editor, 
                currentSelections, SelectionForwardBackPositioning.MOVE_BACKWORD );
            editor.executeCommand( ICommand.ET_EXECUTE, cmd );
          }
        }
      );
      
    viewToFrontItem.setAccelerator(javax.swing.KeyStroke.getKeyStroke(107, java.awt.event.KeyEvent.ALT_MASK, false)); // alt num +
    viewToBackItem.setAccelerator(javax.swing.KeyStroke.getKeyStroke(109, java.awt.event.KeyEvent.ALT_MASK, false)); // alt num +
    viewToMoveForwardItem.setAccelerator(javax.swing.KeyStroke.getKeyStroke(107, 0, false)); // num +
    viewToMoveBackwardItem.setAccelerator(javax.swing.KeyStroke.getKeyStroke(109, 0, false)); // num -
    
    viewToFrontItem.setEnabled( false );
    viewToBackItem.setEnabled( false );
    viewToMoveForwardItem.setEnabled( false );
    viewToMoveBackwardItem.setEnabled( false );
  }
}